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Breakout Discussion – Operations

Home Forums Conferences 2013 Breakout Discussion – Texas Coking Breakout Discussion – Operations

This topic contains 0 replies, has 1 voice, and was last updated by  Anonymous 7 years, 11 months ago.

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    Anonymous

    Jason Schutterle, Sinclair Oil & Steve Carlisle, Lyondellbasell
     
    BEST PRACTICES
    –          Quench Cycles/Hot Spots
    Totalizers for quench water and sour water
    –          Furnace Issues
    Burner cleaning/maintenance
                    PM programs
                    Operations Flexibility
    Spalling
     
    Velocity Steam
                    Heater Inlet PI is a good indicator
                    Charts with valve position and flow rates
    START UP
    –          Make sure the system is dry
    –          Air Free
    –          Take it slow
    –          Start antifoam right away
    –          Start on minute rate
    –          Down fill 1[sup]st[/sup] drum all the way
    –          Test Interlocks
    –          Make sure all electrical equipment is on
    –          Test deluge
     
    SWITCH VALVES
    –          System purge is important
    Lack of steam purge can cause reliability issues with valves
                    N2 for back up purge
    HCGO Properties
    –          Increasing recycle with lower C.R
    –          Quench Oil
    Time/Temp
    HCGO/ LCGO/ Slop
                    Need enough to keep O.H lines wet to prevent fouling
    –          Wash Section – too much pressure can make wash nozzles not work.
    ANTIFOAM
    600,000 cc
    –          Some have antifoam on level control
    –          Carrier
    LCGO/HCGO
    Ratio Controller
    –          Injection Points
    Top is best
    –          Foamovers
    Good level indication
    VELOCITY STEAM (Best Practices)
    –          Looking at heater inlet PIs for steam rates
    –          Charts with valve position and flow rates
    –          If flow meters work use them
    LOTO FOR CONTRACT CUTTING
    Lock out before it’s handed over to contractors.  Contractors apply locks too.
    FURNACE ISSUES (Best Practices)
    –          Rate of rise on skin Tis.
    –          Burner Cleaning

    • Quarterly inspection/ cleaning

    –          Spalling

    • Some use steam without shocking
    • Some use BFW.  Could contain chemicals though
    • Spall as much as possible until you have to come down

    QUENCH CYCLES/ HOTSPOTS (Best Practices)
    –          How much sour water make
    –          Totalizer for water
    –          ½ hour soak helps
    –          Back pressure on drums to mitigate hot spots
    –          Drain and re-quench if you have a hot drum
     
     
    SLURRY FEED (FCC)
    –          Put to quench, can cause problems

    • Coke fines plugging filters
    • Decant coming in cold

    –          Best Practice – Bring in with Feed.

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